Review for SECH12425

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Mixtures can be separated by physical means.

Front

What is the method used to separate a mixture of water and rubber pellets?

Back

Filtration is the method used to separate a mixture of water and rubber pellets.

Front

What is the difference between repetition and replication in scientific experiments?

Back

Repetition refers to conducting the same experiment multiple times to ensure accuracy, while replication involves other researchers conducting the same experiment to verify results.

Front

How many electrons does Silicon (Si) have?

Back

Silicon (Si) has 14 electrons.

Front

What type of change occurs when cutting a pizza into slices?

Back

Cutting a pizza into slices is a physical change.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is the definition of an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is the principle of magnetism in separation techniques?

Back

Magnetism is used to separate magnetic materials from non-magnetic materials in a mixture.